Chart holder



March 8, 1938. A. MCM. HUNTER 2,M0,802

CHART HOLDER Filed April 2l, 1937 2 Sheets-Sheet 1 March 8, w. A. MCM.HUNTER CHART HOLDER 2 Sheets-Sheet 2 Filed April 2l', 5.957

`Patented Mar. 8, 1938 UNITED STATS YATNT CFE Cnam* nomen Albert McMinnHunter, Philadelphia, Pa. Applicaties Ama si, isst, serian No. 138,280v2 claims. (erizo- 16) This invention relates to chart holders, and onethe-interest computing charts illustratmore particularly to a supportingframe espein hinge ap structure; cially designed and constructed forcarrying inis a sectionai perspective View of a terest computing chartsand supporting these pe he front end of the main frame illus- 5 chartsin an eiicient manner whereby easy actratir-g one 'forward cornerthereof and `also illuscess may be had to the charts for the purpose oftrating the manner in which the chart supportreading the same. Y ingtray is pressed from the metal constituting Another object of thisinvention is the prothe main frame. vision of a simple and efficientmeans for hingedly By referring to the drawings, it will be seensupporting the computing charts which are carthat A designates the mainframe which is 10 riecl by the frame so as to permit the charts to beadapted to support a series of interest computing swung from asubstantially upright position for charts B, the main frame being alsoadapted to reading purposes and at the same time permit support acurrent interest chart supporting plate these charts to be swungdownwardly to rest C, as illustrated in Figure l.

upon a supporting plate in a substantially hori- The frame A preferablycomprises a metal body 15 Zontal position, consisting of a metal frontplate Il] which termi-` A further object of this invention is thepronates in a rearwardly extending bridge portion duction of a simpleand efcient means for re- II and is then depressed to provide a tray I2.

movably supporting a series of stacked comput- The tray I2 is preferablysupported at an angle ing charts upon a supporting frame in such ainclining downwardly toward the front end of 20 manner as to firmlyanchor the charts in engagethe frame A, as` shown clearly in Figures 6and 8, ment with the frame and also permit the reand this tray I2terminates in an upwardly eX- moval of the stacked charts for thepurpose of tending rearwardly inclined Wall I3 to provide a replenishingthe charts should occasion arise. back rest for the chart sheets I4 ofthe chart A still further object of this invention is the series B. Theframe A also comprises side plates .25

production of a simple and efficient adjustable I5 which may be securedin any rsuitable or demeans constituting a rest for the hingedsupportsired manner to the sides of the tray I2 and the ing plate, whichhinged supporting plate is rear wall I3 is braced by means of sideplates I e adapted to support the charts when they are in shown inFigure 1. The rear wall I3, however, a turned down or substantiallyhorizontal posiextends slightli7 abOVe the bracing plate I6, as ,30tion. is shown in Figure 3, for the purpose hereinafter Another objectof this invention is the prodescribed, thereby providing an extendingtongue duction of a simple and efficient means for sup- DOIOYI |7- TheSide Plates l5 may be provided porting the current interest chart uponthe top of With litlllrled ailges I3 t0 Which are Secured the supportingframe, supporting knobs I9 in any suitable or desired lg5 Intl-1edrawingsmanner, these knobs being preferably located at Figure 1 is aSide elevation 0f the impr'oved inthe four corners of the main frame A.Secured terest computing chart holder; to the front plate I0 is avertically adjustable rest vFigure 2 is a front elevation thereof,certain plate 29 Which eXtendS across the front of the parts beingYbroken away; frame A, as shown in Figures 6 and '7, and the 40 Figure 3is a rear gevat-,ion of the h01der;` front plate Ill is alsoprovided'near its ends with Figure 4 is a, perspective View of theCurrent a series of apertures 2| into which apertures 2l interest chartsupporting plate which is adapted may it the Securing bOlliS 22 forlooking the rest to be removably secured to the main frame; I plate 2liin a verticallyiadjusted position, the rest Figure 5 is an enlargedvertical section taken plate having a rearwardly turned flange 23 at its45 on line 5 5 of Figure 2; upper end. A name plate 24 may also besecured Figure 6 is a vertical sectional view taken on in place by thebolts 22, such as is shown in Fisline 6 5 of Figure 3; ure 6i. Throughthis adjustment the rest plate Figure 7 is a horizontal, sectional Viewtaken 20 may be vertically adjusted when desired. on line l-l of Figure6; As is shown in Figures 6 and 7, suitable trans- 50 Figure 8 is alongitudinal sectional i view verse box-like braces 25 may be utilizedand may through the lower portion of the main frame Vbe secured to theside plates I5 for bracingrthe illustrating the removable parts inseparated reframe A. lation with respect to the'frame; The front wall IDis provided with a pair of Figure 9 is a perspective view of one end ofapertures 26 which are in alignment with similar 55 apertures 21 formedin the front wall 28 of the tray I2. The rear wall 2S is also providedwith smaller apertures 30 in alignment with the apertures 2 and The rearapertures 30 in the wall 29 are adapted to receive the rear ends of theanchoring bolts 3i which anchoring bolts support the series of interestcomputing charts B, the forward screw heads 32 oi the bolts 3I being inalignment with the apertures 21 and 26 in order to permit a screw driverto be inserted through the apertures 26 and 2l when the plates 2D and 24are removed.

The bolts 3i are arranged in spaced relation and extend through thefront clamping plate 33 the bottom hinge portion 3e oi the hingedsupporting plate 35 and also the spacing plates 36, as shown. The bolts3| also pass through the apertures in the lower ends of the chart platesIKZ, the chart plates being closely arranged and stacked one against theother, these chart plates in turn being clamped in close nested relationby means of a follower plate 31 through which the bolts 3l are threadedwhereby the bolts may be rotated to firmly clamp the parts together aswill be obvious by considering Figure 6. The rear ends of the bolts SIextend through the apertures 30, as previously described, and receivethe cap nuts 3S and washers 39 upon the rear face of the plate 29. Alock nut 40 is carried by each bolt SI, which lock nut engages the innerface of the plate 29 for locking the bolts 3! in anchored relation uponthe plate 29 and firmly holding the stacked computer plates B in properrelation against removal from the frame. When it is desired to removethe series ci computer plates I4 from the frame, they may be bodilylifted therefrom by removing the plates 20 and 24 from the frame A,placing a screw driver into engagement with the screw heads 32 of thebolts 3l to hold the bolts 3| against rotation, loosening the lock nuts4B and removing the cap nuts 38, whereby the series of computing platesB may be bodily lifted out oi the frame, as illustrated in Figure 8.When the nuts 38 and 46 are in proper locking position, however, theseries ci computer plates will be rmly held within the tray I 2 againstremoval as is shown in Figure 6. By means of this structure, the partsmay be readily disassembled and at the same time, the series. ofcomputer plates will be firmly held in position although secured only attheir rear ends through the medium of the bolts 3! in cooperation withthe nuts 38 and 40.

The computer plates It are preferably of a special construction, eachplate Iii being provided with a specially constructed base portionconsisting of a pair of fabric strips 4I engaging opposite sides of thecomputer plates I4, as shown in Figure 9, and rmly secured theretoadjacent the lower edge, the fabric strips being then drawn together toprovide a hinging web 42, and being provided with an intermediatereinforcing filler arranged in spaced relation to the lower edge of theplate Id, the iiller portion as. well as the covering fabric portionbeing provided with apertures 44 to permit the passing of the bolts 3|therethrough as is illustrated in Figures 6 and 7. This constructionwill provide a flexing portion between the lower edge oi the plate Itand the anchoring base so as to permit the chart plates tobe readilyhinged or swung from an upright position shown in full lines in Figurei, to a substantially horizontal position shown by dotted lines inFigure 1. When the plates I4 are are ranged in a substantially uprightposition they are slightly inclined rearwardly to permit the plates toremain in a. proper reading position, and the hinged supporting plate 35previously described normally acts as a cover for the front computerplate I4 when arranged in a substantially upright position. This hingesupporting plate, however, may be swung downwardly to rest upon theupper edge of the rest plate 24 and constitutes a supporting table forthe computing plates I4 when they are swung downwardly.

The plates I4 preferably contain subject matter constituting acomputation of interest on any amount from to $300 at whatever rate maybe required. The present invention, however, does not deal with thisparticular arrangement of computation, but resides in the constructionof the frame and other structural features for supporting the computingplates in proper and convenient position for reference.

In conjunction with the frame A, I also provide a removable plate whichcarries a chart or card upon which is printed the current interest rate.The card is indicated by the numeral 45 and the frame is indicated bythe letter C. This frame is provided with side ilanges @E whichconstitute track-ways for supporting the card 45. The lower end of theplate is provided with laterally extending ears 41 which are bentrearwardly to provide inturned track flanges 48 to t over the upwardlyextending tongue I 'I of the rear plate I 3 previously described. Inthis way, the plate C may be readily attached to or removed from themain frame A when desired. The plate C is oiset as indicated at 49, soas to rest upon the upper edge of the plate I3.

It should be understood that certain detail changes in the mechanicalconstruction may be employed without departing from the spirit of theinvention, so long as such changes fall within the scope of the appendedclaims.

Having described the invention, what claim as new is:-

1. A device of the class described comprising a frame having a trayformed therein extending in an inclined relation, a series of chartsarranged in clamped relation, securing bolts passing through the chartsand holding the charts in clamped assembled relation, said tray having arear wall provided with apertures for receiving said bolts, and meansengaging the rear ends of Said bolts for locking said bolts inengagement with the rear wall of said tray, whereby the series of chartswill be firmly held within the length of said tray.

2. A'device of the class described comprising a frame having a depressedtray arranged in an inclined position, said tray being inclined upwardlytoward its rear end, a series of charts mounted within the tray,clamping bolts passing through the lower ends of the charts, a followerplate carried by the clamping bolts for clamping the charts in packedrelation, said tray having a rear wall provided with a. plurality ofapertures for receiving the rear ends of said bolts, nuts engaging therear extremities oi said bolts adjacent the outer face of said wall, andlock nuts engaging the inner face of said wall for locking said bolts inrm engagement with the wall and iirmly holding the lower ends of thechart within said tray.

ALBERT MCMINN HUNTER.

